Improvement in machines for cutting the screws of screw-bedsteads



ENTTED STATES PATENT @Erica PALMER WILLIAMS, OF TOTVANDA, PENNSYLVANIA.

IMPROVEMENT lN MACHTNES FOR CUTTING THE SCREWS 0F SCREW-BEDSTEADS.

Specioation forming part of Letters Patent No. 126, dated February 16, 1837.

To all whom, zit may concern/.-

Be it known that I, PALMER WILLIAMS, o the borough of Towanda, in the county of Bradford and State of pennsylvania, have invented a new and Im]s .oved Mode of Manu* facturing the T'Vood-Screw Bedstead; and I do hereby declare that the following is a full and exact description.

The nature of my invention consists of a machine ot' two parts. The Atirstpart is used for cutting the right and left boxes orfemale screws in the bedstead-posts and the second part for cutting the right and left male screws on the tenons of the rails.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construct-ion and operation.

1 is a bench four and one-half feet in length, two feet wide, and four inches thick, erected on four legs twenty inches long from the under side of the bench, and four by four inches thick. Through this bench are mortises to receive the necessary posts or standards-wiz., two, in which stand two posts 2, tive inches high, with one screw 3 passing through each, these screws 3 to be ten inches in length, in'- cluding the heads, on the ends oi' which are fastened with a key two followers 4, four inches long, two inches thick, and three wide. vVhen the screws 3 are turned, these followers force the bed-posts up against four upright posts 5, which guide the beam 6. These upright posts 5 are eleven inches high from the top of the bench 1. The space between the two end posts 2, through which thelscrews 3 pass to the outside of the'four upright posts 5, is eight inches. The upright posts 5 are three by four inches thick, the narrowest side facing the beam 6, and the space between them crosswise thebench is fourinches. The object of these upright posts is to guide the beam in raising and lowering it to bring the augers'in contact with the holes bored in the bed-posts for cuttingl the female screws. The beam 6 is ve inches thick and eight deep, with gains in each side to correspond with the four upright posts 5, so that the beam 6 can slide up and down between them. In the center of the beam 6 is a screw 7, passing perpendicularly through it down into the bench 1, which forms the box for its reception. This screw 7 has a channel in it to receive two keys 8 which pass through the beam 6, which beam is raised and lowered at pleasure by turning the screw 7. The angers l0, for cutting the female screws in the bedstead-posts, pass perpendicularly through. the beam 6 and stand twoinches from the outside of .the gains in said beam 6. On the top of the bench 1, directly under the points of the angers, are two ovalized blocks 9, one-fourth of an inch thick, twelve long,and three wide. The use of said ovalized blocks 9 is to avoid the necessity and labor of squaring the bedposts on more than two side" and to let the two squared sides face the be. m 6 and upright posts 5, the center of the blocks 9 to lie directly under the center oi the angers 10...Y

For the purpose of cutting one right and one left female screw the angers 10 are both to be turned toward the center ofthe machine. The foot of the bed-post when placed in the machine is always to be put in from and the top toward the workman. After cutting the first female screws in the bed-posts the bedposts are then to be shifted so as to change places with each other, in order to make a right and a left box or female screw in each bed-post. By this operation the end and side rails are, in putting themv together, made to turn toward the center. The shanks of the angers l0 are eleven and the screw five inches in length and two inches in diameter andthe pipe is one and one-half inch in diameter. The lip or cut of the auger commences onehalf an inch from the end of the pipe, the auger to be hollow and the chip to pass through the cut into the hollow of the auger, whichv hollow is one andonefourth inch in diameter; the bedpost to be tapped with an inchand-a-half auger two inches from the work side, andthe hole for the side rail to be two inches lower down than the hole which receives the end rail.

The second part of the machine may with the other part occupy the same bench by constructingitten feet long, four feet instead of two feet wide, as shown in the the drawings. Three gains are to be cut lengthwise through the bench two and one-fourth inches wide and eight feet long to receive the puppetheads 11 and bed-pieces 12 of the vises 13, the first gain to be four "nches from the edge ofthe bench, thel 'grain six ineh'esfrom long and t'our by four thick.

the `[i1-st, and the third gain eight inches from the second, the bed-pieces of the vises to be six inches wide, three thick, and twenty long and to lie crosswise the bench. On the under side of the hed-pieces there is mortised a piece of wood, which passes through the first gain and receives a key, hy which the hedpiece may be secured at--any point to which it is removed. In these bed-pieces 12 stand two screws 14, passing perpendicularly through the rst gain by the side of the keyed pieces which confine the bed-pieces of the vises. On the heads of these screws 14 are tenons two inches long and one and 0ne-hali` inch in diameter, which are inserted into two blocks hollowed out at the top to receive the rails of the bed-posts. These blocks 15 are six inches long and four by four thick, with a hole in the center to receive the tenons on the heads of the screws 1-l. As the rails vary in size, by turning the screws 111, the tenons will 'oe brought to correspond with the V-blocks 16. Screws 17 pass through the bed-piece of the vise into the second gain. The back piece of the vise 18 passes through the bed-piece ofthe vise and the third gain. Screws 17 and back piece 1S are attached to the jaws of the vises and extend horizontally over the rail. The length of the vise-jaw 13 is eighteen inches In the visejaws 13 keys are to be placed to meet the channels'in the screws 17. As the screws 17' are turned the vise-jaws 13 are made to rise and fall.

The left-hand puppet -head 19 is shown separately in Fig. 2. Its place is directly opposite to that marked 11 at the other end of the table, where it cannot be represented, being, hidden by other parts of the machinery in Fig. 1. The screw which secures the V- block on the puppet-head 11 is firmly attached to it, while that on the puppet-head 19 is cut upon a slidingshaft 20, which is two inches square, and slides through a mortise in 10, being iirmly affixed to the block 2l, which is twelve inches long, four wide, and three thick. A screw 22 passes centrally through this block and into the puppet-head, there being` a sliding1 piece 23, one and onehal inch thick, to guide it correctly.- The screws which receive the two V-blocks must one of them be a right and the other a left handed screw. The tenons of the rails must be sawcd to one length and be two inches from the shoulder. As the rails vary in length between the shoulders, the tenons may not hit the V-block shafts, and the machine must therefore in such case be altered to your right by the center screw,which passes through the puppet-head. The puppet-head on thefleft of the bench is to remain stationary. These puppet-heads 11 are four inches square and fastened with a key on theunder side of the bench.

To fit the machine for use, screw the V- blocks 16 onto the shaft mortised through the puppet-heads and place them parallel with each other, and then saw oft' the shafts in front of and close up to the il-blocks. Then put the rail into the machine-the tenons to come in contact with the V-block shaftsand turn on ,y the V-blocks up to the shoulders ot' the rail and the V will out the male screws, the thread of which ou the ends of the rails to be trimmed off until you come round to where the thread is of the full size. By so doing the tenons oi the rails will enter the bed-posts both at once. If either joint should be open, saw off the V-block shaft of the open joint, which will cause the V-block to commence the screw quicker and the shoulders to hit the posts both at once and form a perfect joint. The V blocks are four by four inches in thickness and fourteen inches in length, with a short handle turned on each end, in the face ot which is insert-ed the V to correspond with the thread of the angers l0.

Having thus fully described my machinery for manufacturing bedsteads which are to be .put together by right and left handed woodscrews, I hereby declare that I do not claim as my invention any of the individual parts of the said machinery taken alone; but

What-i do claim is- The particular manner in whichthose parts are combined together, as herein described, so as to eut the male and female screws in such a manner as to adapt the right and left handed male screws on the opposite ends oi' the rails to the female screws in the posts,-

cansing them to enter and come up to the shoulder correctly under all their variations of size or length; and I do further declare that although I have given certain specific admeasurements and proportion of parts I have done this for the purpose of exemplifi- PALMER WILLIAMS. `iritnesses:

JOHN Laronrn, ABRAHAM BUTLER. 

